When you click on links to various merchants on this site and make a purchase, this can result in this site earning a commission. Affiliate programs and affiliations include, but are not limited to, the eBay Partner Network.
In the FSM it states the blocked portion of the intake gasket goes toward the front of the engine cylinder head, but I took pictures of mine when I took intake off, and it was at rear of engine. I don't know which is right.
I would follow FSM. The intake manifold would block that port on most models. The metal block off is for heater coolant flow. The pin hole allows air to escape.
I would follow FSM. The intake manifold would block that port on most models. The metal block off is for heater coolant flow. The pin hole allows air to escape.
NO, NO, NO - typo in the FSM. restrictors go toward the rear. has nothing to do with heater coolant flow.
the aluminum head variant of the L98 will have a coolant crossover port at the rear of the lower intake. the intake manifold gaskets will have restrictors that go to the REAR of the engine. typo in the FSM. having said that, there are some of us here that use the open port gaskets, without the restrictors, on aluminum head L98's (iron head gaskets work just fine). I did it on my 90, and haven't had cooling issues of any kind - almost 3 years and 10K miles - temps seem normal. the aluminum versions tend to blow head gaskets at either #7 or #8 cylinders - it just happens to be in proximity of the restrictors. coincidence - ??? - you tell me....
NO, NO, NO - typo in the FSM. restrictors go toward the rear. has nothing to do with heater coolant flow.
the aluminum head variant of the L98 will have a coolant crossover port at the rear of the lower intake. the intake manifold gaskets will have restrictors that go to the REAR of the engine. typo in the FSM. having said that, there are some of us here that use the open port gaskets, without the restrictors, on aluminum head L98's (iron head gaskets work just fine). I did it on my 90, and haven't had cooling issues of any kind - almost 3 years and 10K miles - temps seem normal. the aluminum versions tend to blow head gaskets at either #7 or #8 cylinders - it just happens to be in proximity of the restrictors. coincidence - ??? - you tell me....
I found this mistake in the 89 factory service manual years ago and posted it on here for all to see..GM sure screwed that one up big time...If you put the restrictors in the front you could burn your motor up...The 89 FSM also has a few torque specs that are wrong, I wonder how many bolt threads have been ripped out because of bad torque numbers..It really sucks when you can't trust the factory book,....WW
I found this mistake in the 89 factory service manual years ago and posted it on here for all to see..GM sure screwed that one up big time...If you put the restrictors in the front you could burn your motor up...The 89 FSM also has a few torque specs that are wrong, I wonder how many bolt threads have been ripped out because of bad torque numbers..It really sucks when you can't trust the factory book,....WW
- I've found several typos in my 85 FSM - several on torque specs, such as inch-pounds vs foot pounds - fortunately, haven't screwed anything up (yet) -
05-23-2016, 04:21 PM
Intake manifold gasket question
.The 89 FSM also has a few torque specs that are wrong, I wonder how many bolt threads have been ripped out because of bad torque numbers..It really sucks when you can't trust the factory book,..
..WW
- I've found several typos in my 85 FSM - several on torque specs, such as inch-pounds vs foot pounds - 