General internal combustion engine questions.

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2
votes
1answer
18 views

Shortblock vs Longblock

What is the difference between a shortblock and a longblock? Both terms are used to refer to the engine, but what's the difference between them?
2
votes
1answer
57 views

Engine sound rumbles/grumble noise 800-1300 RPM

A 2000 Toyota Celica GTS 225k miles engine makes a mild rumbling/grumbling rough sound when accelerating slowly from a stop in drive or reverse only in the 800-1300 RPM band. Does not occur when in ...
4
votes
2answers
142 views

Should I lap my valves if I have easy access?

Now that I have my cylinder heads out of my V6 Tacoma, I am considering taking the valves out to inspect them in case they are bent or whatever and grind them. There is no symptoms of valves ...
2
votes
2answers
64 views

Why are intake valves dirtier than exhaust?

I took my engine apart and one of the things I noticed, on both cylinder heads of my Tacoma V6, is that the intake valves (picture right) are significantly darker (or dirtier) than the exhaust ones ...
3
votes
1answer
58 views

Should I care about valve order or are they interchangeable?

So I've just learned how to take valves down and I'm pretty fascinated by the whole mechanism. I got a C-clamp compressor and took two valves out just to try. Went smooth. A question: is it important ...
5
votes
1answer
70 views

Acceptable amount of slack in a timing chain with high mileage?

1995 Chevy S-10 Blazer - 4.3 L Vortec V6 (vin W with PCM) - 230,000 miles original owner. FWIW, this model car/engine does not have timing chain inspection and/or changing as part of the routine ...
2
votes
1answer
76 views

What does valve lapping compound actually do?

As I understand, valve lapping is done to ensure a seal between the valve and its seal ring at the end of the shaft. I am just curious how valve lapping compound facilitates that? Does it make a ...
3
votes
1answer
26 views

Valve lapping and lubrication

I have recently taken all my valves out and cleaned them with a wire brush as well as the shafts in the cylinder heads. I am now getting ready to put them back in and have several questions: What ...
2
votes
2answers
187 views

Car still burning oil after replacing head gasket and rings; what's next?

I have a 1991 BMW e34 525i with 374,000 km which burns oil. I don't have any leaks, and I have little smoke when I go uphill and accelerate. I have replaced the cylinder head gasket set and the ...
3
votes
1answer
17 views

What Do I Use for a Thrust Plate After Double Roller Timing Chain Swap

History/Background of This Engine The Magnum 3.9 V6 was introduced in 1992. In 1997, a TSB was issued to fix excessive timing chain noise. The fix was to remove the cam thrust plate and chain oil ...
2
votes
1answer
27 views

When to Use a Sleeve 'N' Seal?

A Sleeve N Seal is a thin-walled metal ring ~1" deep with an accompanying tube of "seal". It comes with some timing cover gasket sets. To install it, you heat the ring up in the oven on 500 degrees ...
3
votes
1answer
22 views

Timing Sprocket Marks Disagree with Distributor for TDC

I am in the middle of replacing my 1998 Dodge Dakota 39. V6's timing set. According to the manual and everywhere online, the camshaft sprocket dot should be at the bottom and the crankshaft ...
5
votes
1answer
37 views

Reliability of water test for valve seal

I took my valves out, cleaned and lapped them and put them back together. I also put new valve stem seals. At least on one side of my V6 Tacoma. I performed several water tests to check the seal of ...
1
vote
1answer
16 views

Are valve guides normally reusable?

A valve assembly diagram from my Tacoma FSM designates valve guides as non-reusable. I was wondering if that is just a CYA or really the case.
4
votes
2answers
737 views

Do valves rotate over time?

As I was doing my valve servicing, one question came to mind: As valves undergo millions of cycles of reciprocating motion, do they actually rotate or is their position relative to the seal fixed? Or ...
1
vote
2answers
21 views

Dodge Stratus 2000 shaking at idle after timing belt replacement

I have a Dodge Stratus 2000 SE 2.4 L with 150,000 miles on it. I decided to change the timing belt and water pump, since my mechanic told me to do so because of the mileage it had on it. Anyways, I ...
3
votes
1answer
86 views

Engine on BMW G650GS 2011 does not start when it's hot

I have a rather strange problem with my BMW G650GS. In the morning, when the engine is cold, it starts fine with a single crank. There is no problem with riding, the engine works fine and never ...
5
votes
2answers
66 views

Water leaking into frame case/engine?

I just had my 2012 Mini Cooper S (66K miles) repaired last week last week for a failed/leaky water pump. My car had an episode where it overheated and shut down and wouldn't start after pulling over ...
1
vote
1answer
170 views

Different heads on Dodge Magnum 360

I'm working on a 98 Dodge Ram 2500 with a Magnum 360 V8 (roller cam shaft). It had a cracked head on one side, so I purchased a pair of remanned heads from an eBay retailer. These heads are the ...
1
vote
2answers
42 views

Car won't start, dies after jump

I have a 2007 Ford Mustang, 6 cylinder. A few hours after I drove it, the battery was completely dead. It can start with a jump, but if left to idle the engine stops soon after the cables are removed. ...
4
votes
3answers
8k views

How do I find a vacuum leak? I'd highly prefer not to use a carb cleaner spray

The car is a 1998 Oldsmobile Intrigue with 3.8L V6 engine (3800 Series). I've been doing my research and due diligence, but please understand I'm very inexperienced with automobiles. I went to ...
0
votes
3answers
327 views

Derbi Senda 50cc won't run correctly?

I have a Derbi Senda SM 50 2005 plate. It has a good spark, however, it's not reading any compression. It's had a new top end and gaskets! What could be wrong? Sometimes it starts when you bump start ...
4
votes
2answers
508 views

Why paint engine?

I've been watching Pete's Garage on YouTube and the guy is absolutely amazing and very enlightening on the subject. He has at least one video on engine painting but he mentions it in a number of ...
2
votes
0answers
24 views

2009 Kia Rio - Potential Misfiring?

I have a 2009 Kia Rio with ~75,000 miles. After I first start the car and accelerate away from where it was parked (especially if I accelerate hard), the car will repeatedly make a quick sound that ...
2
votes
0answers
87 views

Engine randomly turns off on Mazda Capella 2000

Recently I have been having some issues with my Mazda Capella 2000 occasionally just switching off while I am at low revs. It doesn't often happen but when it does it seems to happen multiple times in ...
2
votes
0answers
107 views

Chirping sound from intake manifold, car stalling out?

Over the past 2 weeks or so my car has been making a chirping sound near the intake manifold and the accelerator. The chirping sound comes and go, and about a week ago I had an issue where my car ...
2
votes
1answer
156 views

Engine, sudden reduced power with soft shaking

I have a 2007 Holden with a 2.0 Turbo engine. On one day I decided to go through a light that had just turned orange- so I pressed down, not completely as I new how much power I needed to go through ...
2
votes
1answer
91 views

Ticking/clicking when accelerating 1997 Dodge Caravan

My caravan began ticking when accelerating yesterday. It ticks fairly loudly when accelerating and much softer and slower when idle, or slowing down. Ticks slow and steady when idle or in park. Does ...
2
votes
1answer
38 views

Engine Reving Up in Park and Neutral?

I have a 2001 Chevy Silverado 1500, it has about 118000 thousand miles on the engine, lately it is taching up to over 2000RPM only when i put it in park or neutral. Once i put it into drive or any ...
4
votes
0answers
46 views

Honda XR650l first ride after winterization

Before winter I had the oil changed, filled the gas tank and added the recommended amount of Sta-bil fuel stabilizer. Then rode around for about ten minutes then switched the petcock to off and ran ...
3
votes
0answers
42 views

Minor grinding noise and vibration when car is idle

I have a 2005 stick shift Toyota Camry. Sometimes when I am at a red light or stop sign and the car is in neutral I feel a slight vibration from the pedals and a slight grinding noise coming from the ...
5
votes
1answer
48 views

Rebuild for longevity

So, I have a question about a 98 2.0 rt neon. I am going to get a top/bottom rebuild on it, the block has 260000 km on it. I have seen rebuild kits on the market anywhere from 300 dollars (ebay ...
3
votes
1answer
139 views

Semi synthetic oil engine break-in

I've finished rebuilding the engine of my motorcycle (4 stroke 650cc single-cylinder). For now it runned only once varying between 1000 and 2000 RPM for 5 minutes with a couple of short bursts after ...
3
votes
0answers
69 views

newly rebuilt engine, long warm-up & severe shaking

I have a 2002 Toyota Celica GT with a newly rebuilt engine (ran out of oil and threw rods) but problems still persist. I was told by the mechanic to allow myself a 500 mile break in time of not ...
2
votes
1answer
77 views

Engine jerking and revving, multiple failed ignition coils

This problem started a month ago. My Aveo started revving and jerking when it was sitting at a light on my way home (2 blocks from my house) and the engine light came on. I drove it home. The next ...
13
votes
8answers
19k views

My car's coolant temperature reaches almost 100 C / 212 F in a fast pace

Today, after a very hot day, I saw that my coolant was almost reaching 100C/212, I pulled over, stopped and took a look over the hood. The very little water that remained in the coolant tank was all ...
1
vote
2answers
1k views

Peugeot 206 engine occasionally cutting out when idle

Sorry if this is vague, I don't know very much, but I'll do my best. I want to have as much information possible before taking it to a garage to do anything. I have a 2003 Peugeot 206 1.1l which has ...
7
votes
5answers
23k views

How to get a motor to Top Dead Center

I'm not sure how specific to my car this is or not, so I will include my car information just in case: It's a 1991 Honda CRX, base trim(the motor is the d15b2). On to the question: How do I go about ...
1
vote
2answers
122 views

how a car engine can get accustomed on some behavior?

A lot of people say that a car engine gets accustomed to the driver style and in particular to specific RPM gear changing and it will perform into those "learned" parameters. I must mention that I am ...
1
vote
1answer
19 views

2006 Pontiac g6 rough idle and intermittent spongy brake and starting issue

I have a 2006 Pontiac G6 with 160k on the 3.5 motor. Around 155k the brake pedal went hard and spongy. Also, about 1 in every 40-50 times I start it cold, the starter will turn without a successful ...
4
votes
2answers
146 views

Effects of leaky exhaust valves

While rebuilding my valves, I noticed that 4 out of 6 exhaust valves on one side of the V6 engine were leaking after lapping and I had to relap them. I determined that by doing a water test. I am ...
1
vote
1answer
66 views

1974 Ford Econoline E200 Van acts fuel starved after warm up

I have a 1974 Ford Econoline E200 Van with an 8 cylinder with the present symptoms: It starts and runs great, but once is warmed up, it feels like it is not injecting fuel. It loses power and slows ...
1
vote
1answer
48 views

2001 GMC Jimmy wont start?

Hi I have a 2001 GMC Jimmy it was running fine, then parked it. it starting acting funny, sometimes would take a couple times to start, so checked my oil dipstick, it read a little high and smelt ...
1
vote
1answer
54 views

Had major overheat issue but engine was rebuilt 3 months ago

I had my engine completely rebuilt three months ago (new gaskets, timing belt, water pump, etc.) and yesterday the engine completely overheated (temperature was at the mid-line, then 10 minutes later ...
2
votes
2answers
45 views

Engine run-on (dieseling) condition suddenly getting much worse

1995 Chevy S-10 Blazer - 4.3 L Vortec V6 (vin W with PCM) - 230,000 miles original owner. OBD-I (or 1.5) GM transitional year with OBD-II style connector. I've been working on my vehicle a lot ...
1
vote
1answer
13 views

what engine came in 2007 chevrolet avalanche LTZ?

I have a 5.3 Liter engine from a 2007 Chevy Avalanche LTZ. I removed it and swapped in a 6.0 for a customer. What is the name given to this V8? It has an aluminum block and cast 243 heads. I need to ...
4
votes
2answers
81 views

Is it reasonable to charge the customer $1000+ to assemble the top of the engine?

I recently have an engine overheat issue and see my previous post for details: How long does items in the engine last in general for standard size cars? This is an interesting follow up on that at ...
1
vote
1answer
137 views

Saab 93 Automatic died when waiting for traffic light and won't start again

I just bought a 2006 Saab 93 Aero 2.0T automatic in October, 72000 miles. Everything seems perfect. But 2 weeks ago, the engine died while I was waiting for red light in the town centre, I just braked ...
2
votes
1answer
18 views

1999 Ford Expedition 5.4 sparkplug/ignition coil replacement

I got a service engine soon light and and scanned it. It came out to be cylinder 5 misfire. My truck shook a little on idle more when I gassed it. I talked to some mechanics and told me it would be ...
2
votes
2answers
80 views

How long does items in the engine last in general for standard size cars?

I have a volkswagon passat wagon. It just reach 70000M and it is 2007 model. I recently check the engine at the dealership. Now they asked me to replace all the following items to fix engine overheat ...