I have this car for 5 years now, last summer it was overheated and had to replace the head gaskets. After head gaskets replaced, I checked the compression pressures...facing engine, right side 165, 165, 160, 165...left side 160 165 165 90...the overheated side actually was the right rear side. It runs still. Do I have to correct this problem, if yes, how? What could be the cause? I did torque all the bolts to spec and in sequence. also adjust the valve clearances. The only thing I did not do was to re-surface the heads. This is a Chevy Small Block. Now, I removed A/C system all together since it caused overheated when used. Added a push fan in front of radiator, and the radiator is the same one for a Corvette.
2007-10-06 13:07:58 · 5 answers · asked by James1982 2 in Cars & Transportation ➔ Maintenance & Repairs
you may not have got your block or head clean around the fire ring of the gasket ofr that cylinder, but more likely when it overheated it may have warped the head enough to not let it seal with the new gasket. did you check it with a straightedge? you can try readjusting the valves, but it probably won't help. you can use a leakdown tester to see if it is the rings or valves or a headgasket leaking. taking the a/c off is a great idea. A. the extra load and the heat from the condensor WILL cause it to run hotter, and B. someone that says that it won't has never been around a small block S-truck. i reccommend going to www.s10v8.com and joining. its like 7 or 8 dollars for the membership, and there are alot of very knowledgable guys on those forums. there is alot more help for your blazer there than there will be here. happy hot rodding.
2007-10-06 15:02:44 · answer #1 · answered by sprinkles 6 · 0⤊ 0⤋
1st off, without proper diagnostics you cannot get a proper repair...with that being said...there is an old mechanics saying that my grandfather taught me...the passenger is always right, in other words, the front of the engine facing forward, the right bank is on the passengers side of the car
2nd, the A/C has nothing to do with an engine overheating, except for the belt it is a completely sealed system and has nothing to do even remotely with the cooling system.
3rd, it sounds like you have a hole in your gasket, a ring twisted letting compression blow by if you checked the pistons and found no holes, or a valve not seating properly if you timed it properly. Worst case scenario, a warped head. Get your book back out, take the head off again and check it for warpage with a ruler and feeler guage. Your book should tell you how.
4th, Yes you need to correct this problem as it could cause serious problems if you keep running it causing you to spend more time and money on things like pistons, rings, valves, and resurfacing or new heads.
it sounds like you've got 1 kick "A" blazr if you can get it back into shape and running properly
Good luck and hope this helps
2007-10-06 13:30:01 · answer #2 · answered by num1huckfinn 5 · 0⤊ 1⤋
If they are laminated gaskets, and if they are not they should be trashed anyway, they will be pretty thick and set up to handle a 60 over 4" bore at least. This means you will have a large squish area when you install them on the small bore 305. This will work but you can also dig a hole with a fork. It would perform better to go get a headset specifically for the small bore engine you have, thus getting rid of the large squish area (detonation prone) and at the same time keeping the compression up to near the design amount. But it would work though poorly.
2016-05-17 21:55:33 · answer #3 · answered by ? 3 · 0⤊ 0⤋
The left side last cylinder (actually its #7 or #8, not sure from too many Fords) is low on compression. This could be from, as said, improper valve lash or a sticky valve.
2007-10-06 13:20:48 · answer #4 · answered by Lab 7 · 0⤊ 0⤋
Adjust the valve lash.
It's messy on GM engines, but so worth it.
2007-10-06 13:11:30 · answer #5 · answered by Mr. KnowItAll 7 · 0⤊ 1⤋