overheating problem with engine swap
Thread Starter
Intermediate
Joined: Nov 2014
Posts: 25
Likes: 0
You may need to reject the carb for a 383. It maybe leaning out and that would cause overheating. Also the cam your using may make less vacuum and cause less vacuum advance and that can cause overheating. You may have both Sanrio going at that same time. This happened to me.
Burning Brakes
Joined: Oct 2010
Posts: 1,192
Likes: 7
From: Wentzville MO
Make sure all your foam seals around the radiator support are in place. That will push the most air possible through the radiator. Do a compression check and that would let you know if you have a blown head gasket. Not a bad idea with a new engine. There is a tester from NAPA that can test your radiator fluid and lets you know if you have any gas or oil in the fluid again a head gasket issue.
Last edited by donnie1956; May 13, 2015 at 10:02 PM.
Thread Starter
Intermediate
Joined: Nov 2014
Posts: 25
Likes: 0
Make sure all your foam seals around the radiator support are in place. That will push the most air possible through the radiator. Do a compression check and that would let you know if you have a blown head gasket. Not a bad idea with a new engine. There is a tester from NAPA that can test your radiator fluid and lets you know if you have any gas or oil in the fluid again a head gasket issue.
Melting Slicks
Joined: Mar 2002
Posts: 2,164
Likes: 7
From: Beringen
Team Owner
Joined: Oct 2004
Posts: 81,241
Likes: 3,062
From: altered state
St. Jude Donor '05
If you have the right radiator cap theres no need for a spring in the hose, youll notice most replacements dont come with them
Had a similar issue on mine when new turned out Id forgotten about how many lbs the cap was supposed to be and vented/vs non
Right one on no more hose collapsing.
Took running the engine at cruise rpm for a little bit til you could actually see it collapsing (above 3k). Put a spring in for the heck of it not really needed though.
Fixing the head gasket is one thing just find the original cause
After 70 mi or so you got seepage somewhere or a collapsing hose
Make sure there are no cracks in the heads, if they are iron have them magnafluxed or youll have the same issue keep us posted.
Had a similar issue on mine when new turned out Id forgotten about how many lbs the cap was supposed to be and vented/vs non
Right one on no more hose collapsing.
Took running the engine at cruise rpm for a little bit til you could actually see it collapsing (above 3k). Put a spring in for the heck of it not really needed though.
Fixing the head gasket is one thing just find the original cause
After 70 mi or so you got seepage somewhere or a collapsing hose
Make sure there are no cracks in the heads, if they are iron have them magnafluxed or youll have the same issue keep us posted.
Race Director
Joined: Dec 1999
Posts: 19,610
Likes: 778
From: Forked River NJ
Looks to be a head gasket by the symptoms you say are happening. If it's blown no amount of re torquing is going to help. Don't waste your time pull the heads and find out what the problem is and fix it. Look the head gasket over carefully and it should tell you where the problem is.
Instructor
Joined: Apr 2006
Posts: 108
Likes: 0
From: Green Cove Springs Florida
383 overheating
I live in the Asbury Lakes area and I am getting problems with over
heating. One of my Lifters got damaged when my gas cable stuck and
over revved the engine. I had all of the Lifters replaced and adjusted. The
mechanic said it was also out of timing so he adjusted it. The car (69) Stingray has a new 383 stroker engine installed about 15 months ago, less
than 2000 miles on it. Motor runs great no missing or obvious problems.
Engine was built by Sinister Hotrods and finishing touches by Russ's
Automotive on Beaver St. in Jacksonville.
I had a BeCool new radiator installed, new radiator cap and I removed
the thermostat for checking purposes. I have 3 electric fans on the radiator (2 pushing and 1 pulling)
HHHEEELLLPPP.
Bill Dempsey
904-608-0329
william.j.dempsey@comcast.net
heating. One of my Lifters got damaged when my gas cable stuck and
over revved the engine. I had all of the Lifters replaced and adjusted. The
mechanic said it was also out of timing so he adjusted it. The car (69) Stingray has a new 383 stroker engine installed about 15 months ago, less
than 2000 miles on it. Motor runs great no missing or obvious problems.
Engine was built by Sinister Hotrods and finishing touches by Russ's
Automotive on Beaver St. in Jacksonville.
I had a BeCool new radiator installed, new radiator cap and I removed
the thermostat for checking purposes. I have 3 electric fans on the radiator (2 pushing and 1 pulling)
HHHEEELLLPPP.
Bill Dempsey
904-608-0329
william.j.dempsey@comcast.net
Melting Slicks
Joined: Apr 2009
Posts: 2,632
Likes: 112
From: Great Plains Iowa
If you have the right radiator cap theres no need for a spring in the hose, youll notice most replacements dont come with them
Had a similar issue on mine when new turned out Id forgotten about how many lbs the cap was supposed to be and vented/vs non
Right one on no more hose collapsing.
Took running the engine at cruise rpm for a little bit til you could actually see it collapsing (above 3k). Put a spring in for the heck of it not really needed though.
Fixing the head gasket is one thing just find the original cause
After 70 mi or so you got seepage somewhere or a collapsing hose
Make sure there are no cracks in the heads, if they are iron have them magnafluxed or youll have the same issue keep us posted.
Had a similar issue on mine when new turned out Id forgotten about how many lbs the cap was supposed to be and vented/vs non
Right one on no more hose collapsing.
Took running the engine at cruise rpm for a little bit til you could actually see it collapsing (above 3k). Put a spring in for the heck of it not really needed though.
Fixing the head gasket is one thing just find the original cause
After 70 mi or so you got seepage somewhere or a collapsing hose
Make sure there are no cracks in the heads, if they are iron have them magnafluxed or youll have the same issue keep us posted.
Springs are put into long bottom hoses to prevent their sucking shut when the engine hasn't had the chance to warm up (pressure) and the engine is operated at a high rpm. Once a normal operating temperature is reached and pressure is built the hose won't collapse.
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Drifting
Joined: Jan 2011
Posts: 1,853
Likes: 81
From: Hamilton Virginia
ok to answer everyone's questions the engine is a re-manfactured 383 stroker long block from raptorengines.com the old water pump was replaced with a new one on installation of the motor the problem had be diagnosed as a blown head gasket the exhaust is white and smells sweet which is a big indicator as well as the overheating as to where the coolant is going i assume when it over heats its pushed out through the coolant overflow while boiling ive seen it happen once so thats the current assumption also i believe the blown gasket might be due to a lack of following builder instructions the say after the first start up im to retorque the head bolts which we never did also there may be some timing and tuning issues to work out as well but thats update i need to get a torque wrench and see if tightening the the head bolts could alleviate this issue