Bahahahahaha!

 

Quick question, I have a friend with a Prelude who is getting 25% lower compression on two cylinders. What is the most likely outright cause? Car has like 100K on it, but he has a pretty heavy foot.

 

Rings are wearing out ---common problem with higher mileage motors.

GO FLAME GO!!

 

100k is pretty low to start havin compression issues.

3 things can cause lower compression:

leaky piston rings (usually on car that run very rich or have high kms)
blown or blowing head gasket (from overheating or high stress)
bad valve seals/bent valves (usually from either over reving the engine or from high mileage)

A leakdown test will tell you guys where the leak is.

 

High mileage! Wasn't that long ago I would buy a car with 100K because it was low mileage

I usually havn't had issues with the rings until around at least 175K on other makes of cars, are Honda's not as durable? What is the story?

 

Yeah he is doing that test this weekend, just wondering what the likelyhood is of the problem.

 

is the car running rough and is anything coming out of the tail pipe? I would say it's probably valves or the headgasket unless he did very very irregular oil changes and let the oil stuff go for way too long!

 

Oops I was thinking 100,000 miles as this site is typically in imperial.

 

that's still only 160 000kms on a honda that's like half of it's life gone and the other half left to enjoy!

 

Imperial = FTL! SI FTW!!!

 

True most for Hondas---but sometimes the odd one is buggered---who knows the motor could have being abused ---such as poor maintenance long periods of none use whch leads to corrosion of internals--etc.

 

From what I understand it should be running around 200 on each cylinder, his has 190 for two and 166 & 155 for the other two. It has been running fine, but throwing engine codes. Nothing from the tail pipe, no signs of leakage around the head either.

He is renting a compressor this weekend to test it, I guess I will find out when I get back.

haha, I am totally on the fence after doing all my Engineering in imperial for the last 7 years I still use KM for cars... but I use inches and feet for every other measurement! My new client is Metric... has been driving me crazy!!

 

what kind of codes is it throwing?

 

Not sure, he was saying some very general engine code. I will ask on Monday

Have a good weekend guys, I am out!

 

Drive safe bro, that snow is killer all the way out to banff

 

Please don't blow up the 135i before I can try it out.

kthxbye

Drive safe man!

 

Piaa's in stock yet


Good news, brakes feel really nice now that I have been able to work them in a bit. Car feels like it can come to a stop much quicker, those brakes feel like glue when you stop.

 

Not yet Nick, should be by the end of week but sometimes these easterners cant get their shi*t together.

 

Sweet, hopefully nice weather this weekend so I can clean up the paint on my fog housing and take the tint off.

 

i just happen to be in TO this week..the weather is +25, no snow and the people here have been very nice...so if you could hold off dissing them until i get back on friday that would be very nice....lol by the way i have'nt seen 1 modded fit yet? what's up with that? only civics...